How to set up SMTP server?

[scissorband]

Running the latest Snow Leopard

I started up Postfix via 'sudo postfix start' and I can telnet into port 25 of 127.0.0.1 fine, but when I do I just get:

$ telnet 127.0.0.1 25
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
HELO there

I get no response or 220 welcome acknowledgment that the SMTP server is running?

 

[LPZ]

I get

Shrike: ~] telnet 127.0.0.1 25
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 Shrike.local ESMTP Postfix

This is on 10.6.4, without changing any of the postfix configuration files.

After entering the telnet command, open a second Terminal shell (Terminal->Shell->New Window) and enter the top command. Do you see smtpd in the COMMAND column?

Did you try sending a test email from your telnet session? Is the "HELO there" in your original post something you entered, or part of the response from the telnet command?